[Kevin P McAuliffe] “As for the audio question, first, select your two video clips, right click on each one of them, and then select “Break Apart Clip Items”.
This will separate the audio and video. Now, simply grab and drag whichever audio clip you want to overlap, over the other audio clip. Now, you’ll see a “bar” on your audio that tells you that your audio is at 0db. Simply hold “Option” on the keyboard, and you can now quickly add a keyframe to your audio track. Now, simply add another one, and set the value to 0. Hope this helps.
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Is this really the easiest way to add a cross dissolve between two audio clips(Shift+E in FCP7) in FCPX?